Certificates of Coverage (CoC) Explained: Why They Matter for Remote Workers

When Swiss employees work temporarily outside Europe, social security can become complicated quickly. Without the right document, both employer and employee may face contributions in more than one country.

For assignments and remote work in countries with a bilateral social security agreement, the key document is often the Certificate of Coverage, or CoC.

A CoC confirms that the employee remains covered by the Swiss social security system during a temporary stay abroad. For employers, it is an important safeguard against double contributions and unclear insurance status.

What is a Certificate of Coverage?

A Certificate of Coverage is an official confirmation from the competent social security authority. In a Swiss context, it shows that an employee remains affiliated with the Swiss AHV/AVS system while working temporarily in another country.

This is relevant where Switzerland has a bilateral social security agreement with the destination country. These agreements define when continued Swiss coverage is possible and what conditions must be met.

In practice, a CoC helps confirm that:

• the employee stays covered in Switzerland
• the employer and employee do not have to contribute to two systems at the same time
• the temporary work abroad is handled under the correct social security agreement
• the host country can see proof of continued Swiss coverage

Which countries can be relevant?

Switzerland has bilateral social security agreements with a range of countries outside the EU/EFTA framework.

Examples include:

• United States
• Canada
• Australia
• Japan
• South Korea
• India
• Chile
• Israel
• Serbia
• Turkey

The exact rules depend on the destination country and the applicable agreement. That is why the country check matters before an employee starts working abroad.

When do employers need a CoC?

A Certificate of Coverage is typically relevant when:

• an employee is temporarily assigned from Switzerland to a partner country
• a Swiss-based employee works remotely abroad for a limited period
• the employment relationship and payroll remain in Switzerland
• the employee continues to contribute to Swiss AHV/AVS
• the destination country has a social security agreement with Switzerland

Common examples include a Zurich-based engineer working on a project in Australia, a Geneva consultant supporting a client in India, or a Swiss employee spending part of the summer working remotely from the United States.

In each case, the CoC helps show that the employee remains insured in Switzerland during the temporary work period.

Why CoCs matter for employers

Without a valid CoC, companies and employees may face avoidable risks.

These can include:

• double social security contributions in Switzerland and the host country
• uncertainty around pension, accident, unemployment, or other social insurance coverage
• compliance issues during local checks or audits
• employee concerns or disputes if insurance status is unclear
• last-minute delays before a project or workation can begin

For HR, payroll, and mobility teams, the CoC is therefore more than an administrative form. It is practical evidence that the correct social security system continues to apply.

How to apply for a CoC

In Switzerland, CoC applications are handled through the Swiss compensation offices, known as Ausgleichskassen or caisses de compensation.

The process usually includes:

• submitting the application before the assignment or remote work period starts
• providing employer and employee information
• confirming the destination country and planned duration
• showing that employment and salary remain linked to Switzerland
• waiting for approval and issuance of the certificate

Processing times can vary depending on the compensation office and destination country. For that reason, employers should avoid leaving the request until the last moment.

What if there is no bilateral agreement?

If Switzerland does not have a social security agreement with the destination country, a CoC usually cannot be issued.

In that situation, local social security rules may apply in the host country. Employers may also need to consider whether voluntary Swiss AHV/AVS coverage is possible or useful to preserve pension rights.

Before approving international work, companies should therefore check not only the travel dates, but also whether a social security agreement exists and which document is available.

How Vamoz simplifies CoC management

Managing Certificates of Coverage manually can be time-consuming, especially when teams work across several countries or when remote work abroad becomes more frequent.

Vamoz helps companies:

• identify when a CoC may be required
• collect the right information for the application
• support coordination with Swiss compensation offices
• track assignments, dates, and destination countries
• reduce the risk of double contributions and compliance surprises

This allows employers to support global flexibility while keeping social security obligations under control.

Conclusion

Certificates of Coverage help Swiss employers make temporary work outside Europe safer and clearer.

They protect employees by confirming continued Swiss social security coverage, and they protect companies by reducing the risk of unnecessary double contributions.

For international assignments, business travel, and remote work abroad, the CoC should be checked early, before the employee starts working from the destination country.

Book a demo to see how Vamoz helps companies manage Certificates of Coverage for global teams.